/Engine/Plugins/Protocols/MQTT/Source/MQTTCore/Public/MQTTShared.h
FMQTTSubscribeResult ( const [EMQTTSubscribeReturnCode](API\Plugins\MQTTCore\EMQTTSubscribeReturnCode) InReturnCode, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FMQTTSubscription](API\Plugins\MQTTCore\FMQTTSubscription), ESPMode::ThreadSafe > InSubscription )